package com.it.reggie.controller;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.PutObjectRequest;
import com.it.reggie.commen.R;
import org.apache.commons.io.IOUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

//文件上传和下载整合oss
@RestController
@RequestMapping("/common")
@SuppressWarnings(value = "all")
public class OssController {

    @PostMapping("/upload")
    public R imgUpLoad(MultipartFile file, HttpServletResponse response) {
        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "LTAI5tB5ds1siFGKySjp1DCQ";
        String accessKeySecret = "ilUEbRUn8VVZsKLpfolc9kb1IM0jzW";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "reggie-dish-img";

        String originalFilename = file.getOriginalFilename();
        String fileName = originalFilename.substring(originalFilename.lastIndexOf("."));
        fileName = UUID.randomUUID().toString() + fileName;
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        try {
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, fileName, file.getInputStream());
            // 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。
            // ObjectMetadata metadata = new ObjectMetadata();
            // metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());
            // metadata.setObjectAcl(CannedAccessControlList.Private);
            // putObjectRequest.setMetadata(metadata);

            // 上传文件。
            ossClient.putObject(putObjectRequest);

            //得到上传之后的文件地址
            //https://bucketname.endpoint/objectnane  https://upload-demo-liu.oss-cn-hangzhou.aliyuncs.com


            System.out.println("上传之后的文件路径" + fileName);

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }



        return R.success(fileName);
    }


    @GetMapping("/download")
    public void imgDownload(String name, HttpServletResponse response) {

        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "LTAI5tB5ds1siFGKySjp1DCQ";
        String accessKeySecret = "ilUEbRUn8VVZsKLpfolc9kb1IM0jzW";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "reggie-dish-img";

        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。


        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        try {
            // ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
            OSSObject ossObject = ossClient.getObject(bucketName, name);

            InputStream objectContent = ossObject.getObjectContent();
            IOUtils.copy(objectContent, response.getOutputStream());

            // 读取文件内容。
//            System.out.println("Object content:");
//            BufferedReader reader = new BufferedReader(new InputStreamReader(ossObject.getObjectContent()));
//            while (true) {
//                String line = reader.readLine();
//                if (line == null) break;
//
//                System.out.println("\n" + line);
//            }
            // 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
//            reader.close();
            // ossObject对象使用完毕后必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。
            ossObject.close();

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (Throwable ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

    }
}
